ARM: imx: dynamically allocate imx2-wdt devices

Currently there is no platform data used in the driver.  In case this
changes and for consistency NULL is passed unused to the soc specific
functions.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/mach-imx/mach-pcm038.c b/arch/arm/mach-imx/mach-pcm038.c
index 2cfc4b96..3c9f2df 100644
--- a/arch/arm/mach-imx/mach-pcm038.c
+++ b/arch/arm/mach-imx/mach-pcm038.c
@@ -173,7 +173,6 @@
 static struct platform_device *platform_devices[] __initdata = {
 	&pcm038_nor_mtd_device,
 	&pcm038_sram_mtd_device,
-	&mxc_wdt,
 };
 
 /* On pcm038 there's a sram attached to CS1, we enable the chipselect here and
@@ -325,6 +324,7 @@
 
 	imx27_add_fec(NULL);
 	platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
+	imx27_add_imx2_wdt(NULL);
 	imx27_add_mxc_w1(NULL);
 
 #ifdef CONFIG_MACH_PCM970_BASEBOARD